Stanmore station was opened on 10 December 1932 by the
Metropolitan Railway (now the
Metropolitan line). The station building and those on the branch were designed by the Metropolitan Railway's architect,
Charles W. Clark, in the suburban style used on the company's other post-
First World War stations such as those on the
Watford branch. The introduction of fast, direct trains into London attracted commuters to the Metropolitan Railway and presented competition for the
London, Midland and Scottish Railway, who operated a rival train service from
Stanmore Village railway station approximately away. The slower LMS trains ran on the
Stanmore branch line as far as , where they connected with London-bound services, but after 20 years of competing with the Metropolitan line, the Village station was closed by
British Railways in 1952. In 1934, a proposal to extend the Metropolitan line northwards was discussed by the
London Passenger Transport Board's Engineering Committee as an alternative or complementary scheme to the
extension of the
Northern line from
Edgware. It would have required of double track tunnel to reach the proposed station at
Elstree South with Metropolitan line trains continuing to
Bushey or
Aldenham. A revision of the proposal in 1936, considered extending the Stanmore line to
Elstree. The proposals were not included in the plans eventually submitted for parliamentary approval in the LPTB's
New Works Programme. Following construction of deep-level tube tunnels between
Finchley Road and
Baker Street, the Stanmore branch of the Metropolitan line with its five stopping stations between Finchley Road and
Wembley Park was transferred to the
Bakerloo line on 20 November 1939. This service was then transferred to the Jubilee line on 1 May 1979. In 2005,
Transport for London began the construction of a third platform at the station. This was structurally complete by the summer of 2009 but could not be brought into use until new signalling equipment on that part of the line had been commissioned, the platform opening to use in July 2011. == Services ==